Carbon-holder



(No Model.)

H. H. LEVETT.

CARBON HOLDER.

No. 327,282. Patented Sept. 29, 1885.

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UNITED STATES PATENT OFFICE.

HENRY H. LEVETT, OF PHILADELPHIA, PENNSYLVANIA.

CARBON-HOLDER.

EPECIFICATION forming part of Letters Patent No. 327,282, datedSeptember 29, 1885.

Application filed May 18, 1885. (No model.) Y

.T 0 all whom it may concern:

Be it known that I, HENRY H. LEVETT, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Carbon-Holders forElectric Lights, which improvement is fully set forth in the followingspecification and accompanying drawings, in which Figures 1 and 2represent side elevations of a carbon-holder embodying my invention.

Fig. 3 represents a section thereof in line as a", r

Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of a carbon-holder provided with an eccentric,which is adapted to clamp the carbon and hold it firmly in the block orV-shaped guide.

It also consists of a spring adapted to sup port theeccentric, permitthe eccentric to yield during its rotations on the carbon, and occasiona firm contact of the parts.

It also consists of a packing of asbestus or other non conductingmaterial interposed between the spring and the plate, which forms thebearings for the axis of the eccentric.

It further consists of means for diffusing the heat communicated to theholder.

Referring to the drawings, A represents a guide having a groove, usuallyV-shaped, in which the carbon B is seated, said guide being connectedwith the carbon rod in any suit able manner.

0 represents a bent metallic spring, oneli mb of which is attached to anarm, D, projecting from the upper end of the guide A, and the other limbextends vertically, and has secured to its inner face a metallic plate,E, the lower portion whereof forms the bearings for the axis F of aneccentric, H, the face of which is adapted to be brought into contactwith the side of the carbon B, said eccentric having a handle, J, foroperating purposes.

The ends of the plate E and arm D are connected by a strip, K, of metal,preferably copper, and interposed between the ends of said strip and thespring 0 is a packing, L, of asbestus or other suitable material.

It will be seen that when the carbon is fitted to the guide and theeccentric is properly rotated the face of said eccentric bears ortightens against the carbon, and thus clamps the latter to the guide ina firm and reliable manner, it being noticed that the spring C yields,permitting the rotary motions of the eccentric on the carbon, and theeccentric has a firm contact with the carbon.

By rotating the eccentric in the reversed direction its holding'power onthe carbon is relieved, and thus the latter may be readily withdrawnfrom the guides, as is evident.

The packing L prevents heating ofthe spring, and the strip K serves toconduct any heat communicated to the plate E to the arm D, and thusdiffuse the same throughout the guide and connected parts of the holder.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. Acarbon-holder consisting of a guidehaving an arm, D, a spring, 0,secured to said arm, a metallic plate secured to said spring, and aneccentric journaled in said plate, substantially as and for the purposeset forth.

2. The V-shaped guide A, having an arm, in combination with a springsecured to said guide and carrying a plate in which is journaled aneccentric, substantially as and for the purpose setforth.

' 8. A carbon holder having a guide, a clamp, and asupporting-spring'for said. clamp, and a packing of non-conductingmaterial interposed between said spring and thebearing of said clamp,substantially as described.

at. A carbonholder having a clamping device and a strip of metal betweenthe bearings of said device and the guide of the holder for diffusingheat, substantially as described.

HENRY H. LEVETT.

Vitnesses JOHN A. WIEDnRsHEIir, A. P. GRANT.

